A double sealing device for a rotating shaft comprising a first and a second seal of annular form mounted side by side in a peripheral groove formed in a wall of a circular cylindrical housing through which the shaft to be sealed passes. At least one of a discharge or vent channel opens into the peripheral groove between the two seals. The seals comprise a carrier ring with an outer axial flange and an inner radial flange, and a sealing washer applied to each carrier ring to cover a part of an outer face of the axial flange. A sealing lip bearing is formed slidably on the shaft, the first seal sealing a first fluid medium and the second seal sealing a second fluid medium. The axial flange has an extension forming a pierced structure, not covered by the sealing washer of the seal, and disposed facing the peripheral groove.

A shaft seal in which a seal element a seal element and a gasket as held members are held between an outer case and an inner case, and, a protruding portion to locally increase holding pressure on the seal element is disposed on a pressing face for held member of the inner case.

A shaft seal in which a seal element a seal element and a gasket as held members are held between an outer case and an inner case, and, a protruding portion to locally increase holding pressure on the seal element is disposed on a pressing face for held member of the inner case.

A valve device includes: a housing; a valve element; a rotatable shaft that rotates the valve element; a seal member that is slidably in close contact with an outer peripheral surface of the rotatable shaft to limit penetration of gas through a gap between the rotatable shaft and the housing; and a mounting ring that is shaped in a ring form and mounts the seal member to the housing. The mounting ring has: a ring portion, a one-side plate portion and an opposite-side plate portion which are formed from a single continuous plate material. The one-side plate portion and the opposite-side plate portion clamp the seal member therebetween and are joined together through the ring portion.

A seal device including a housing enveloping a piston rod, wherein the housing includes at least one ring groove at a cylindrical inside of the housing that is oriented towards the piston rod, wherein a seal ring configured as an annular disc is inserted into the at least one ring groove, wherein the at least one ring groove includes at least two protrusions at opposite side walls, wherein the at least two protrusions press against the seal ring inserted into the at least one ring groove, wherein the at least two protrusions are arranged opposite to each other in a portion of a groove opening oriented towards the piston rod in the at least one ring groove, and wherein the at least two protrusions are configured to dampen lateral movements of the seal ring.

A seal device including a housing enveloping a piston rod, wherein the housing includes at least one ring groove at a cylindrical inside of the housing that is oriented towards the piston rod, wherein a seal ring configured as an annular disc is inserted into the at least one ring groove, wherein the at least one ring groove includes at least two protrusions at opposite side walls, wherein the at least two protrusions press against the seal ring inserted into the at least one ring groove, wherein the at least two protrusions are arranged opposite to each other in a portion of a groove opening oriented towards the piston rod in the at least one ring groove, and wherein the at least two protrusions are configured to dampen lateral movements of the seal ring.

Systems and methods include providing an annular seal stack for an assembly. The seal stack is disposed within an annulus formed between a probe and a housing of the assembly and configured to provide a radial seal between the probe and the housing. The seal stack includes a first support retainer, a first lipseal, a first seal support system comprising at least one support ring disposed between the first support retainer and the first lipseal, a second support retainer configured to support the first lipseal, a second lipseal, a second seal support system comprising at least one support ring disposed between the second support retainer and the second lipseal, and a third support retainer configured to support the second lipseal.

Systems and methods include providing an annular seal stack for an assembly. The seal stack is disposed within an annulus formed between a probe and a housing of the assembly and configured to provide a radial seal between the probe and the housing. The seal stack includes a first support retainer, a first lipseal, a first seal support system comprising at least one support ring disposed between the first support retainer and the first lipseal, a second support retainer configured to support the first lipseal, a second lipseal, a second seal support system comprising at least one support ring disposed between the second support retainer and the second lipseal, and a third support retainer configured to support the second lipseal.

A sealing device for a drive shaft is disclosed and described. The sealing device for a drive shaft comprises a housing disposed to surround the drive shaft between the inner space and the outer space, a plurality of sealing members axially separated from each other between the housing and the drive shaft to seal between the housing and the drive shaft, fixing ring members interposed between the plurality of sealing members to maintain the separation distance between the sealing members, and a fixing member secured to the housing to apply an axial pressure to the plurality of sealing members and fixing ring members, wherein a concave-convex section is formed on at least one of the close surfaces of the fixing ring member and the sealing member, which face each other.

The subject application relates to a cupseal for a compressor and method for preparing the same. Systems and methods are disclosed that include providing an annular seal for a compressor. The annular seal includes a substantially planar first portion, a first angled portion extending at an angle from the substantially planar first portion, and a second angled portion extending radially at an angle from the first angled portion. The annular seal is formed from a fluorinated polymer and includes at least one additive or filler. The annular seal exhibits reduced wear and an increased lifespan.